Pile wire for looms



June 25, 1935 c. R. scHRElNER PILE WIRE FOR LOOMS Filed June 20, 1934 WITNESS ATTORN EYS Patented June 25, 1935 lUNITED STATES PILE WIRE FOR LOOMS Carl R. Schreiner, Brooklyn, N. Y. Application June 20, 1934, Serial No. 731,422

6 Claims.

This invention relates to pile Wires for looms, including a holder for a removable blade, which blade is readily replaceable by a like blade.

The object of the invention is to provide a blade and blade holder, in which the blade body is supported with respect to the channel into which its lower edge is inserted mainly by a key and key- Way located rearwardly of the cutting edge of the blade, the interengagement of said parts constituting the chief means for retaining the blade in proper operative position. The blade and the holder in assembled condition provide a structure which is substantially smooth on both side faces of the holder and blade and all lingers or lugs extending beyond the side surfaces of the spoon and of the holder are eliminated. A further object of the invention is to provide the key extension of the blade with substantially strong and comparatively large holding members in order to eliminate thin and narrow members or extensions on the blade, thereby avoiding breakage of the key portions and permitting the blade to be assembled in the holder-byvsliding motion and substantially eliminating the flexing of any of the individual edges of the key.

In the drawing, Fig. 1 represents a side elevation of the pile wire and holder; Fig. 2 is a top view thereof; Fig. 3 is a side view of the blade; Fig. fl is a cross-section on line ll-l of Fig. l;

' Fig. 5 is a view, similar tov Fig. 1, showing a modiication but omitting the blade; Fig. 6 is a section on line 6 6 of Fig. 5; Fig. 7 is a side elevation of the face portion of the blade holder and pile wire before the keyway member is attached; Fig. 8 is a top View of Fig. 7, and Fig.-9 is a side elevation of the keyway member, which when spot-Welded to the blade of Fig. 7 will complete the structure of Fig. 5.

Thev pile wirel is provided with the blade holder 2 having a slot 3 therein, which slot is bordered by the side walls 4 and 5. The blade holder 2 shown in Figs. l, 2 and 4, is made, in a manner -well known in this art, o fv a suitably shaped sheet of metal bent up to the form illustrated in Fig. 4, the upstanding side walls being somewhat decreased thickness by a swedging operation or the like to make room for the blade. The blade holder 2 when made in this fashion, is attached to the pile wire I by welding at X. The front side wall 5 of the blade holder is provided with a lip 6 extending upwardly with respect to the top edge of the side wall 5. The free end of the holder is provided with a spoon 7. 'I'he spoon 'I is provided with a keyway 8, which keyway comprises an irregular shaped groove comprising the cross groove 9, and the longitudinal groove I0. The walls defining the cross groove 9 constitute engaging edges H and the walls defining the longitudinal groove IU constitute engaging edges I2. The longitudinal groove I0 merges withthe slot 3, and in proximity to the point of merger the groove I extends entirely across the inside face of the rear wall 4 toy provide the shoulder I 3. The blade, preferably of theflexible steel type, comprises the body portion I 4 and the inclined cutting edge I5. The rear of the blade is provided with an integral extension or key I6 (see Fig. 3) which key comprises the substantially long neck ll and the cross member I8. The blade body and its key, by reason of their configuration, provide the engaging shoulder I 9 on the blade body, engaging surfaces 20 on the neck I'I and the engaging surfaces 2| on the cross member. The relation of the blade and holder when assembled, are as follows: the lower edge of the body of the blade extends into rthe slot 3 but the lower edge of the blade does not necessarily rest upon the bottom of the slot; the terminal tip 22 of the blade extends into the Slot 3 and below the upper edge of theside walls 4 and 5; the lip Slies against the front face'of the blade below the cutting edge thereof; the shoulder I9 on the blade body bears against the shoulderi 3 the engaging surfaces 2t on the neck of the blade are aligned and in close proximity to the engaging edges I2 of the longitudinal groove I0 andthe engaging surfaces 2| on the cross member I8 are aligned and in close proximity to the engaging` edges II on the cross groove 9.

When the blade is assembled in the holder its tip22 is free from locking engagement with the blade holder and the entire cutting edge I5 welded, so to speak, from the anchoring portions I, Il' and I8.k Due to the described construction the ily and grease which, as the result of the method of weaving pile carpets for example, tends to accumulate in the slot 3, are not forced and packed in a hard body in the slot and do not tend to detract from .the efficiency of the cutting operation. The key I5 is made to lit'the grooves 9 and-.Ill snugly and so that the parts may readily interengage by a sliding motion of the blade. By reason of the large surfaces of the key It, breakage of the key is avoided and if an attempt is made to ex the key, the strain thereof will 4be readily taken up by the long neck Il. A blade, should it be desirable to replace it by reason of dullness of its edge or by breakage, is readily removable and inasmuch as the tip end 22 of the blade i'snot positively held, it canbe readily removed from the slot 3 should the blade break during operation. Inasmuch as there are no undercut; portions or corners in the slot 3, it can be cleaned should it become congested with fly or grease. The blade, by reason of its being supported from the key I6, is provided with slight free movement, reducing the tendency to break, as breakage is always a source of annoyance inasmuch as a broken blade in the holders heretofore used tends to swing up exposing theblunt brokenv edge, which brokenV edge coming into engagement with the pile, rips or tears the pile instead of cutting it cleanly. Inasmuch as blade is secured against movement in, all direc.-

on the groove, this type of blade andblade holder is particularly advantageous in cutting pilei of carpets which are woven with the face. down., where the pile cutter operates with the blade edge-1 in a downward direction.

the vmanufacture ofthe holder it is also pos'- sible;to swedgethevend of the pile wire itself'. Thisis. illustrated in Figs. 5-9. The end ofthe wire inV such f cases i-s reduced to the configurati'onnshown in Figs. 7. and 8, the'slot 3 being milled out, resulting in the pile wire I, the side Walls #land 5, and the portion of the rear spoon 1 being integral. When the pile wire is utilized for forming the aforementioned part of the holder, the; leeyxmtylA member 8 and the lip 6 are made separately as.` shown in Fig. 9 and this unitl is then spot-welded'in proper position (Fig. 5) with the. parts ofl the holder formed directly fronr the endof. the pile wire. This method of forming the holder` overcomesv ma-ny objectionable features ofiv the present types of' holder, in which theiholder is Vtormedseparately from the wire and haslts end butt-Welded to: thefwire. Suchy buttwelding provides a weakened area at they point ofvunion of' the wire and the holder andvthere is: often breakage` at this point.

, I claim;

1.. In a..pile. cutting device, incombination, a holder; a spoon at one end of the holder, a keyway: in thev spoon, said keyway comprising a longittudinal groove and a groove crosswise thereof, atslot between the side Walls of saidhold'er, a blade, a key oni-the blade, said key having along,A flexibleY neck. and across member on said? neck,"V said cross member being located at the extreme end. oftsaid neckf and.'` comprising two armszextending crosswisethereof, said-Y neck ii-tting into said longitudinal. groove and the cross member. fitting into said crosswise groove, the lower portion ofthe; body of the blade fitting intoj said slot;

2.. In a..pil'e cutting device, in combination',l a holder, a spoon at one end of the holder, a key,

wayin the spoon, said keyway comprising aI lon-v gitudinal .groove and a groove crosswise thereof,

said crosswse-Jgroove extending beyond both sideedgesof said longitudinal groove, a'slot'between' the..` side. walls of said` holder, a blade, a long,

flexible key on the blade, said key` having a neck? andi. across member locatedy atthe extremeend of said neck, said cross member extending to each side of said neck, said neck fitting into said longitudinal groove and the cross member tting into said crosswise groove, the lower portion of the body of the blade fitting into said slot.

3. In a pile cutting device, in combination, a holder, a spoon at one end of the holder, a slot between the side walls of the holder, a plurality of grooves in the spoon, one of said grooves eX- tending longitudinally of the spoon and one eX- tending crosswise of sai'd spoon, a blade, a key Orri the blade, said key having portions corresponding to and fitting into the grooves in said spoon, a lower portion of the body of the blade tting. inta. the said slot, the lower edge of the body ofthe blade being spaced from the bottom ofth'evgroove--and the tip end of the blade being unsupported, .whereby the blade body floats between said side walls.

4.; Ina pile cutting device, in combination, a

holder, a slot between the sidewalls of the holder, a spoon at, onel end of the holder, a keyway in thel spoon, said keyway comprising a longitudinal groove and a transverse groove at one end ofthe longitudinal groove', the other end ofv the longitudinalgroove extending crosswise of the spoon to the top edge of the spoon, a blade, a key extending from the body ofsaid blade at a distance below the' cutting edge thereof, a shoulder between the point of'junction' ofthe key and the body of theV blade and the cutting edge of the blade, a: long', flexible neck and a transverse extension on the neck substantially in the plane of the body of the blade, said transverse extension, said neckl and said shoulderhavingan outline corresponding substantially to they outline of said keywa-y and fitting said'keyway, the lower portion of the body of the` blade fitting into said slot, whereby ythe blade-issecured in said holder against accidental removal the tip endof the blade being unsupported.

5i. In aipile cutting device, in combination, a holder, a spoon on thev holder, agroove in the spoon; a. slot'between the side members of' the holder; a-tapering blade, a key-'on the blade, said key extending from the wi'deend of the blade and' lying'. in theplane of the blade, said key fitting into the groove: in said' spoon, the end of the blade being unsupported and the-.bladebodybeing secured in said holder4 solely by the interengagement ofsa-i'dl'key'iand said groove. y

6;. Ablade adapted for association with aholdersof afpilecutting device, comprising albody portion havinga diagonal cutting edge, a long, flexible neck atthe wide end of said bodyportion, a crossmemberr at the freeend of said long neck, said crossmembercomprising twoV arms extending toteach-v side of "said long,v exible neck at substan# tially right angles thereto, engaging edges at'the inside of saidfarms1,a shoulder extendingfrom thei'nnerend or the-neck toward thecutting edgeofthe blade, said'neckiandarms being adapted to fit intocorrespondinggrooves and said shoulder being adapted to` ft against a corresponding shoulder in the spoon` end of a pile-cutting device.y

CARL R. SCHREINER.

or (A 

